Ram ventilation, Biology

Ram Ventilation

Some fish do not use pumping action for gill ventilation. It has been known for long that large tunas cannot be kept alive in captivity unless they are put in circular tanks where they can swim continuously. The fish swim with their mouths partly open and there are no visible breathing movements. Water flows continuously over their gills. This is known as ram ventilation.

It is now known that many fish breathe by pumping at low speed and change to ram ventilation at high speed. In this case the work of breathing is transferred from the muscles of the opercular pump to the muscles of the body and tail. However, ram ventilation is more economical as far as energy consumption is concerned than opercular pumps at high rates required for fast swimming.

Posted Date: 1/15/2013 6:56:42 AM | Location : United States







Related Discussions:- Ram ventilation, Assignment Help, Ask Question on Ram ventilation, Get Answer, Expert's Help, Ram ventilation Discussions

Write discussion on Ram ventilation
Your posts are moderated
Related Questions
Explain single pan balance and Electronic Digital Balance? Single Pan Balance: This is a very sensitive balance used for weighing quantities less than 10 grams. It accurately w

Explain about the Cancer and Infertility - Obesity? Cancer: Risk of cancers of the colon, rectum and prostrate increases greatly in obese men while obese women are more likely

CONDUCTIO N OF IMPULSE - IN NON-MYELINATED AXONS - The impulse moves along the axon as local effect by altering the permeability of neighbouring Na +  channels and af

Explain the Flavour Binding? Some protein preparations, although acceptable from a functional and nutritional stand point, necessitate a deodorizing step to remove the bound of

Relapse of infective endocarditis usually occurs within two months of the discontinuation of antimicrobial therapy. The relapse rate for patients with native-valve endocarditis cau

Determine uses of Soybean protein? Soybean protein concentrates have been used as stabilized dispersions in milk- like beverages and simulated dairy products, such as sour crea

What is the taxonomy of protozoa?

Non-threshold  approaches For  genetic carcinogenes, the  "NOEL-safety factor"  approach  is generally  not considered a suitable method for setting the acceptable intake level

What is Septal Ablation (TASH/PTSMA) ? This is a nonsurgical interventional treatment. The septal myocardium supplied by 1 st septal branch of left anterior descending artery

detail about cytoplas